[Bug target/97770] Missing vectorization for vpopcnt

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97770

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
For target side, we need to add expander for popcountm2 with m vector mode